Panorama

http://www.gnu.org/software/panorama
'Panorama' includes modeling, rendering, and post-processing; animation support will be added soon. It is structured as an API composed of two dynamic lib and several plug-ins. It currently includes a console mode front end, but a graphical interface is also being developed. Users can use other interfaces, as long as they use the Panorama API or output some scene language that Panorama can read. Plug-in architecture lets you load just the components you need; these components can be substituted or added to without recompiling. This allows for better interaction of modules and makes the program run faster. Several rendering methods (including raytracing and zbuffer) are available without any other change in the input scene file. A post-processing system lets you apply filters to the whole image after it has been generated by the renderer; there are also object filters, which you apply to an object during the rendering process. Material have a BSDF that encapsulates its properties with respect to the light.

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